the respiratory system exchanges oxygen and carbon dioxide between the blood, air & tissues
TRANSCRIPT
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THE RESPIRATORY
SYSTEM Exchanges oxygen and carbon dioxide between the blood, air & tissues
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NOSE & MOUTH Entryway for air
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PHARYNX
Common pathway for food and air
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EPIGLOTTIS
Flap that closes off the trachea when swallowing (prevents choking)
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LARYNX
Voice box containing vocal cords
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TRACHEA
Tube lined with cartilage rings (carries air to lungs)
trachea
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BRONCHI &BRONCHIOLES Branch off from trachea into lung
bronchi
bronchioles
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ALVEOLI
Grape-like air sacs responsible for exchanging gases with the blood
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LUNGS
Have large surface area for gas exchange
HEALTHY LUNG
EMPHYSEMA
LUNG CANCER
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DIAPHRAGM Muscular sheet that contracts to bring air into & relaxes to push air out of the lung
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NOSE
EPIGLOTTISLARYNX
BRONCHIOLES
ALVEOLI
TRACHEA
DIAPHRAGM
PHARYNX
BRONCHI
MOUTH
LUNGS
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Inhalation Exhalation
Air in
Air out
Diaphragm
Ribs
rise
Ribs
fall
Mechanisms of Breathing
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4.ASTHMA
narrowing of bronchial tubes and swelling of the mucous membranes. (allergy-related)
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5.
Alveoli loose their elasticity
(stay filled w/air after exhaling)
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Diseases caused by smoking:
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The 411 on Tobacco1. Ingredients- cyanide
- carbon monoxide
- nicotine (addictive drug that stimulates nervous system)
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In regular respiration, O2 (oxygen) hooks onto hemoglobin in the
blood & is transported to the body.
When smoke is inhaled, O2 is replaced by CO – carbon monoxide
(which is toxic).